When comparing Mutt vs Claws Mail, the Slant community recommends Mutt for most people. In the question“What are the best native e-mail clients for Linux?” Mutt is ranked 2nd while Claws Mail is ranked 6th.
Ranked in these QuestionsQuestion Ranking
Pro Terminal based
Pro Small and efficient
Pro Threads emails
Pro Active development
Even though it was first released in 1995, Mutt still enjoys an active community following it and having new releases constantly.
Pro Highly Configurable Macros
Pro Low resource client
Claws Mail is a low resource e-mail client that is often default in low resource Linux distributions.
Pro Clean interface with 5 layout variants
Pro Has many plugins for extra functionality.
Pro Good support for Google's services
It runs inside the terminal so it doesn't display HTML email, fonts, or graphical elements.
Con Interface looks old and setup is not easy
The icons as well as the rest of the interface look like an application from the early 90's, with this there is also no easy setup options built in like the more modern e-mail clients.